A review of animal models from 2015 to 2020 for preclinical chronic wounds relevant to human health. Issue 3 (August 2021)

• Record Type: Journal Article
• Authors: Zindle, Jennifer K.; Wolinsky, Emma; Bogie, Kath M.
• Is Part Of: Journal of tissue viability. Volume 30:Issue 3(2021)
• Page Start: 291
• Page End: 300
• Publication Date: 2021-08
• Subjects: Chronic wounds -- Animal models -- Wound infection; Wounds and injuries -- Periodicals; Ulcers -- Periodicals; Bedsores -- Periodicals; Bedsores; Ulcers; Wounds and injuries; Electronic journals; Periodicals; 617.1406
• DOI: 10.1016/j.jtv.2021.05.006
• Languages: English
• ISSNs: 0965-206X

Abstract

Abstract: Significance: Chronic wounds fail to heal in a timely manner and exhibit sustained inflammation with slow tissue repair and remodelling. They decrease mobility and quality of life, and remain a major clinical challenge in the long-term care of many patients, affecting 6.5 million individuals annually in the U.S., decreasing mobility and quality of life. Treatment costs are a major burden on the U.S. healthcare system, totalling between $25 and $100 billion annually. Chronic wound severity depends upon several factors such as comorbidities, severity of tissue damage, infection and presence of necrosis and vary greatly in their healing mechanisms. In vivo animal models are critical for studying healing pathways of chronic wounds and seek to replicate clinical factors for trials of topical, systemic, and device-based therapeutics. This comprehensive review discusses murine, rat, lapine, canine, feline and porcine models of chronic wounds. Recent advances: Foundational chronic wound models for several species are discussed together with refinements and advances in the time period between 2015 and 2020 which have the potential for broad utility in investigating biological and device-based wound treatment therapies for human health. Critical issues: Chronic wounds fail to heal in a timely manner and have differing aetiologies, rendering no single in vivo animal model universally applicable. Future directions: Further studies are required to develop clinically relevant chronic wound animal model which reflect the clinical reality of the various influences of age, disease, comorbidities and gender on delayed healing and enhance understanding of the biological processes of human wound healing. Highlights: Appropriate animal models are essential for pre-clinical studies of novel wound therapies for human health. Multiple chronic wounds origins and mechanisms mean that having one in vivo model will not fit all human therapeutic studies. Continued animal model use provides vital insight on biological processes delaying healing leading to improved patient care. Further studies are needed to create animal models which reflect the clinical realities of delayed healing in human wounds.